Cisco 6503 - Catalyst Firewall Security Sys Installation Manual page 261

Chapter 4 Removal and Replacement Procedures
For multiple DC-input power supplies, each DC input must be protected by a dedicated circuit breaker
Note
or a fuse. The circuit breaker or fuse must be sized according to the power supply input rating and the
local or national electrical code requirements.
To install a 4000 W DC-input power supply and wire it for 4000 W operation in the right power bay
(POWER 2), follow these steps:
Ensure that the system (earth) ground connection has been made. For ground connection installation
Step 1
instructions, see the
Verify that source DC power is off to the DC circuit that feeds the power supply that you are installing.
Step 2
As an added precaution, place the appropriate safety flag and lockout devices at the source power circuit
breaker, or place a piece of adhesive tape over the circuit breaker handle to prevent accidental power
restoration while you are working on the circuit.
Prepare the source DC-input power cables by attaching the appropriately sized lugs.
Step 3
The power supply terminal block lug opening width is 0.62 inch (15.8 mm). The terminal posts are
centered 0.63 inches (15.88 mm) apart and have a 1/4-20 thread. We recommend that you use an
appropriately sized industry standard 2-hole, standard barrel compression lug. (See
power supply ground posts, located below the terminal block, also have 1/4-20 threads and require two
1/4-inch split-ring washers and two 1/4-20 hex nuts.
The DC-input wires and the DC power supply ground wires should be sized according to the local and
national installation requirements. Use only copper wire. For North American installations, use
90°C-rated, fine-strand copper conductors.
Figure 4-38
Ø .267
2 holes
All measurements in inches
Use both hands to install and remove power supplies. Each DC-input power supply weighs 32 pounds
Caution
(14.5 kg).
Grasp the power supply handle with one hand, and place your other hand underneath the power supply.
Step 4
Slide the power supply into the power supply bay. Make sure that the power supply is fully seated in the
bay. (See
OL-5781-08
"Establishing the System Ground" section on page
DC Power Cable Lug
2.25
.25 .63 .37
Figure 4-39.)
Removing and Installing the DC-Input Power Supplies
Crimp area
Catalyst 6500 Series Switches Installation Guide
3-52.
Figure 4-38.) The
4-55